Hi My name is Jean-Louis, ZS6AAG i am experimenting with uplink to the satellite with antenna logarithnic 12db, one hackrf and one ampli 2.4ghz 8 watts from china, can i attack directly the wifi amplifier or i need something between the hackrf and the wifi amplifier, many thanks for your answer

I have one of those. It is real value for money and it has a very nice interface to the computer (not very important when all you want is to use it as an SDR for 1 specific application, but still...). However you must understand that it is just a "learning" tool and evaluation tool for the AD9363 and not really suiable for everyday radio use without addition of extra filtering and (pre-)amplification.

E.g. the receiver mixes the input with a squarewave LO signal so when you tune it to the 2m band for example, it will receive the 70cm band just as well, the 23cm band a bit less, etc. Result is really abysmal receive performance when you connect it to an outdoor VHF/UHF antenna in a residential area. An RTL-SDR really does much better!

Of course within the field of usage we are discussing here, e.g. use it as an SDR to receive Es'hail-2, part of the requirements are already satisfied by adding an LNB. It probably would not hurt to insert a bandpass filter around 739 MHz between the LNB and the ADALM PLUTO. Remember it is no problem when there is some loss there, the LNB has a very high gain anyway.